ID: 42009
User updated by: robin_fernandes at uk dot ibm dot com
Reported By: robin_fernandes at uk dot ibm dot com
Status: Closed
Bug Type: Scripting Engine problem
Operating System: *
PHP Version: PHP 5.3.0-dev (cli) (built: Nov 27 2007 16:18:57)
Assigned To: dmitry
New Comment:
Thanks for the explanation. Would it be reasonable to change the
description of the test is_a.phpt, which currently states:
"is_a() and is_subclass_of() shouldn't call __autoload" ?
Previous Comments:
------------------------------------------------------------------------
[2007-12-03 16:29:12] [EMAIL PROTECTED]
is_subclass_of() doesn't call __autoload() in case if first atgument is
an object. Because if it's an object its class ,all parent classes and
implemented interfaces are already loaded.
In case if first arguments is string, PHP will call __autoload() for
it. This is not a bug but expected behavior.
------------------------------------------------------------------------
[2007-12-03 15:46:44] robin_fernandes at uk dot ibm dot com
This has been fixed for the second argument passed to is_subclass_of(),
but not the first.
The test below shows that is_subclass_of() still invokes __autoload()
for the first argument, contradicting the description (but not the
content) of test is_a.phpt. Note that if this is fixed, the expected
output for is_a.phpt will need to change.
---( Test case: )---
<?php
function __autoload($name) {
echo("AUTOLOAD '$name'\n");
}
Class Def {}
var_dump(is_subclass_of("Undef", "Def"));
?>
---( Expected output: )---
Warning: Unknown class passed as parameter in %s on line 6
bool(false)
---( Actual output: )---
AUTOLOAD 'Undef'
Warning: Unknown class passed as parameter in %s on line 6
bool(false)
------------------------------------------------------------------------
[2007-08-22 13:24:03] [EMAIL PROTECTED]
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
------------------------------------------------------------------------
[2007-08-17 20:13:25] [EMAIL PROTECTED]
According to the commit log is_a() and is_subclass_of() should NOT call
__autoload, in the same way as "instanceof" operator.
But indeed the is_a.phpt does have check to see if __autoload was
called and expects it -> there's bug somewhere.
Dmitry, please check this out.
------------------------------------------------------------------------
[2007-07-16 15:02:50] robin_fernandes at uk dot ibm dot com
Description:
------------
This is either a minor mistake in a testcase description, or a bug in
is_subclass_of().
The description of testcase
http://lxr.php.net/source/ZendEngine2/tests/is_a.phpt states:
"is_a() and is_subclass_of() shouldn't call __autoload".
However, the expected output explicitly checks for __autoload() calls
*in some cases* (lines 49 and 50).
Either the testcase description (and perhaps documentation) should
clarify in which circumstances is_subclass_of() does result in an
invocation of __autoload(), or is_subclass_of() should be fixed.
Below is a simplified testcase illustrating a case where
is_subclass_of() does invoke __autoload().
Reproduce code:
---------------
<?php
function __autoload($name) {
echo("AUTOLOAD '$name'\n");
}
Class Def {}
var_dump(is_subclass_of("Def", "Undef"));
?>
Expected result:
----------------
bool(false)
Actual result:
--------------
AUTOLOAD 'Undef'
bool(false)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=42009&edit=1
